\begin{table}
\caption{blah\_blah}
\centering
\begin{tblr}[         %% tabularray outer open
]                     %% tabularray outer close
{                     %% tabularray inner open
colspec={Q[]Q[]Q[]},
column{1}={halign=l,},
column{2}={halign=r,},
column{3}={halign=r,},
}                     %% tabularray inner close
\toprule
& mean & sd \\ \midrule %% TinyTableHeader
mpg & \num{20.09}  & \num{6.03}  \\
hp  & \num{146.69} & \num{68.56} \\
\bottomrule
\end{tblr}
\end{table} 
